is there any free or paid tool/api where we can use the exact input image to create a new image using generative ai or any other automated way.

Two scenarios below

1- I have an input image of a cap and want to generate a new image of a boy wearing the exact same cap.

2- or I have an image of a model wearing pearl necklace. In another image I have a png gold necklace and want to replace that pearl necklace with this gold necklace in a new image.